Moved some files and started skeleton db

scryfall_deser/src/db.rs

@@ -0,0 +1,34 @@
+use dir_spec::Dir;
+use sqlite;
+use std::fs;
+
+const CACHE_FOLDER: &str = "scryfall_cache";
+
+// NOTE: this should be idempotent
+pub fn create_cache_folder() {
+    let cache_folder = Dir::cache_home();
+    match cache_folder {
+        None => {
+            panic!("Can't find a cache folder - really don't know what the problem is sorry");
+        }
+        Some(mut f) => {
+            f.push(CACHE_FOLDER);
+            let ret = fs::create_dir(&f);
+            match ret {
+                Ok(_) => (),
+                Err(_e) => {
+                    let err_string = format!(
+                        "Couldn't create folder within your cache folder: {}",
+                        f.display()
+                    );
+                    panic!("{}", err_string);
+                }
+            }
+        }
+    }
+}
+
+pub fn init_db() -> bool {
+    create_cache_folder();
+    true
+}

scryfall_deser/src/lib.rs

@@ -1,7 +1,8 @@
 mod download;
-
 pub use crate::download::download_latest;
 
 mod deser;
-
 pub use crate::deser::ScryfallCard;
+
+mod db;
+pub use db::init_db;

scryfall_deser/src/main.rs

@@ -9,7 +9,7 @@ struct Args {
 }
 
 fn main() {
-    let mut args = Args::parse();
+    let args = Args::parse();
     if args.update {
         unimplemented!("Haven't implemented update yet");
     }